Atomic & Molecular Physics (CSIR Physical Sciences): Questions 7 - 9 of 18

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Question number: 7

» Atomic & Molecular Physics » Relativistic Corrections for Energy Levels of Hydrogen Atom

Appeared in Year: 2014

MCQ▾

Question

A permanently deformed even – even nucleus with JP=2+ has rotational energy 93 KeV. The energy of next excited state is – (June – 2014)

Choices

Choice (4) Response

a.

372KeV

b.

310KeV

c.

273KeV

d.

186KeV

Question number: 8

» Atomic & Molecular Physics » LS & JJ Couplings

Appeared in Year: 2012

MCQ▾

Question

The spin orbit interaction in an atom is given by H=aLS where L and S denote the orbital and spin angular momenta, respectively of the electron. The splitting between the levels 2P32 and 2P12 is – (June)

Choices

Choice (4) Response

a.

12a2

b.

52a2

c.

32a2

d.

3a2

Question number: 9

» Atomic & Molecular Physics » Population Inversion

Appeared in Year: 2012

MCQ▾

Question

Consider the energy level diagram shown below, which corresponds to the molecular nitrogen laser.

 The energy level diagram

the Energy Level Diagram

In figure the energy level diagram is shown.

If the pimp rate R is 1020atomscm3s1 and the decay routes are as shown with τ21=20ns and τ1=1μs , the equilibrium populations of states 2 and 1 are respectively. (December)

Choices

Choice (4) Response

a.

1014cm3and2×1012cm3

b.

2×1012cm3and1014cm3

c.

zeroand1020cm3

d.

2×1012cm3and2×106cm3

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